[feature] cross sync rule with website

[dev-a]

This add-on is a very good job it missing rules cross-sync: extensions sync rule over-the-web (on read only) for exemple: on every firefox startup : go to www.myserver.com/rules.txt (or https://raw.githubusercontent.com :stuck_out_tongue_winking_eye: ) and add this rules ...

this feature would be helpful when we use Firefox on différent computer

[vladimiry]

I'd prefer the extension is implementing Firefox Sync support. Some extensions do that (syncing own configs), which is a quite convenient functionality.